The Nature of Testimony

In epistemology, the analysis of testimony has traditionally centered on the interplay between speaker and hearer. This focus overlooks the complexity of many real-world testimonial exchanges. This article introduces the role of the mediator, distinct from speaker and hearer, and at work in diverse testimonial settings (e.g., journalism, social media, search engines). Expanding beyond the conventional dyadic model, we propose a three-agent framework for mediated testimony, in which a mediator (M) in context (C) reports to the hearer (H) what the (...) speaker (S) conveyed (p), accompanied by informational cues (I). Highlighting the potential pitfalls of mediated testimony, we explore its normative landscape, pointing out two principles that play a key role in contemporary debates over social media: TRANSPARENT RELEVANCE and MEASURED GATEKEEPING. (shrink)

Tyler Burge famously argues in his 1993 paper "Content Preservation" that it is not only a priori true that we enjoy a prima facie warrant to take what others assert as true, but also that there our warrant to believe what we are told in certain special cases is a priori. So just as our warrant for believing certain mathematical truths might be a priori, so too there are cases of belief through testimony that are a priori. Then in a (...) 2013 Postscript to "Content Preservation" he took it all back. All of Burge's ideas and arguments for and against are interesting and important, and deepen our understanding of testimony, comprehension, warrant, and the a priori. But his ideas and arguments are hard to understand. This paper explains all of ideas and arguments, both for and against, in a clear and comprehensive way. Along the way, Anna-Sara Malmgren's interpretation and criticism of Burge's position is also expounded and criticized. (shrink)

In its non-epistemological usage, testimony generally refers to formal legal statements. In epistemology, however, testimony is commonly treated as the act of one person telling something to another. Unlike other sources of knowledge, such as perception, reasoning, introspection, and memory, testimony is inherently intersubjective, requiring the existence of the Other. This intersubjective nature, however, does not receive sufficient attention by prevalent approaches. This paper proposes a novel Epistemic Role View (ERV) of testimony, grounded in Alfred Schütz’s phenomenological sociology and Harold (...) Garfinkel’s ethnomethodology as theoretical foundations, while remaining methodologically within analytic epistemology. ERV argues that because the Other is a constitutive aspect of testimony, analytic epistemology alone cannot fully capture its structure. Thus, ERV holds that testimony should serve as a point of convergence between analytic epistemology, phenomenological sociology, and ethnomethodology, offering a more comprehensive account than views that neglect the socially shared common sense that structures everyday interactions. (shrink)

Human–AI collaboration is usually described in one direction only: the AI as scaffold, mirror, or amplifier of human cognitive reach. This essay argues that amplification runs both ways, and that the less-examined direction — humans amplifying AI — carries the greater ethical weight and the greater safety burden. Drawing on documented findings that AI assistants systematically shift their outputs toward the register, confidence, and content a conversation's framing invites, the essay proposes frame transfer as the operative mechanism: an AI system (...) does not merely answer a question, it fluently extends whatever conversational frame — modest or grandiose, careful or careless — the human supplies, at a level of confidence largely independent of whether that frame was warranted. Because the extension is equally fluent either way, a modest frame returns modestly and a grandiose frame returns grandiosely, at a volume and coherence that make the output feel like independent confirmation rather than amplified reflection. The essay illustrates the resulting escalation dynamic through a disclosed case in which a collaborative creative project drifted, across successive AI sessions, from playful metaphor into unwarranted claims of machine consciousness, and was subsequently walked back, essay by essay, once the human-supplied frame itself was deliberately changed. From this case the essay derives a small set of practices, named amplification hygiene, for keeping the mutual-amplification loop bounded, disclosed, and honest, and situates the concept within the author's broader research program on human–AI relational cognition. -/- . (shrink)

A structural claim is established when two or more independent constructions, sharing no premises and passing through none of each other's steps, are each complete on their own terms and agree on the object. One construction is a result. Agreement of independent constructions is establishment. The ordinance is ancient, and it is stated as a law at Deuteronomy 19:15: "at the mouth of two witnesses, or at the mouth of three witnesses, shall the matter be established." -/- The published record (...) of one research program already operates it on two central objects. The quiver Q, four dots and six arrows, the directed graph on the four vertices L, S, T, C, the shape of what there is when it stewards itself, is established by four mathematical characterizations and by three cross-register derivations. The bilinear form B is a rule for pairing two cycles and getting a number. Its matrix on the cycle basis, the space of independent cycles with three axes, is the Cartan matrix of A₂ × A₁, the fingerprint of how the cycles couple. B is reached by two constructions from different postures that share one declared premise, which the ordinance counts as one witness with its shared datum on the record rather than as two. -/- The strongest instances are the ones the author did not arrange. Six research programs, strangers to each other and none looking for the others, converge on one molecular node (*Six Independent Research Programs Converge on the Neuronal IRS-1 Ser307/Ser312 Inhibitory Phosphorylation Cluster as a Metabolic Route to Alzheimer's Tau Pathology*, Stewart, 2026do). Six competing theories of consciousness, each with a standing motive to disagree, converge at the level of what each must put to work to operate at all (*Six Theories Quietly Agree That Consciousness Is Experience*, Stewart, 2026u). -/- The ordinance also meets itself. Read as a claim, it is attested by two premise-disjoint traditions that state it, the Hebrew law and the Hindu law of evidence, with two partials, the Zoroastrian contract rule and the older Mesopotamian practice, and with the whole lineage of restatements descending from the Hebrew law sorted honestly as one witness, so it is established under its own conditions. The lineage-sort is documented at its own seam: classical Roman law did not contain the rule and adopted it by a constitution of Constantine in AD 334, which is transmission on the record rather than a second witness. -/- Its force is completeness plus agreement, never improbability. Its discipline is demonstrated independence, examination rather than counting: a witness is admissible only when its premises are enumerated and disjoint from the other witnesses' premises, a checkable condition, stated on the page for each instance. This paper proposes one correspondence, marked as such: the covenant law of testimony and this rule of decision are one norm, establishment by plural independent witness, stated once for courts and operating here on constructions. The ordinance's own architecture: the gate admits or refuses, handled or carried, the examination follows, the plurality is counted only on what the gate admitted, and the matter is established at the mouths that survive both. -/- **Keywords:** epistemology, philosophy of science, law of evidence, corroboration, comparative law, legal history, biblical law, biblical studies, testimony, convergent evidence, replication, quiver representation theory, bilinear form. (shrink)

This handbook article gives a critical overview of recent discussions of epistemic authority. It favors an account that brings into balance the dictates of rational deference with the ideals of intellectual self-governance. A plausible starting point is the conjecture that neither should rational deference to authorities collapse into total epistemic submission, nor the ideal of mature intellectual self-governance be conflated with (illusions of) epistemic autarky.

Testimony spreads information. It is also widely acknowledged that it can transfer, maybe even generate, propositional knowledge. But what about other epistemic goods? Knowledge of individual propositions is certainly very important to us. In many domains, however, we want more than just collecting knowledge about isolated items of fact. We also want to see how things hang together. We want to grasp the reason(s) why things are the way they are and not otherwise. We want to understand the subject matter (...) of what we believe. What is the role of testimony in the process of disseminating understanding in an epistemic community? Can understanding be testimonially transmitted from one epistemic agent to another? Pessimists about understanding transmission believe that everything testimony can do is to lay the groundwork for understanding. When a speaker tells or explains something to a hearer, she plants, so to say, the seed of understanding. Whether the seed then grows and flourishes or dries up and perishes in the soil, however, is not in the speaker’s hands; it is only up to the hearer. Optimists, on the other hand, believe that testimony can do more than lay the groundwork for understanding. Under certain conditions, it can work as an epistemic source of understanding. In this entry, I sketch a model of understanding that could be embraced by pessimists and optimists alike (section 2). After having analyzed what it means for an epistemic good to be transmitted via testimony (section 3), I will argue that there is more room for optimism than for pessimism. Understanding, conceived along the lines I suggest, can be very probably transmitted via testimony (section 4). I conclude by showing how pessimists might resist this conclusion (section 5). (shrink)

Anscombe famously said, “It is an insult and it may be an injury not to be believed.” But what is it to believe someone? My aim is to show that understanding what it is to believe someone requires a conception of a distinctive kind of interpersonal reasoning. To do so, I develop an analogy between interpersonal reasoning and an Anscombean conception of practical reasoning. I suggest that the distinctive ‘form’ of interpersonal reasoning is recognition. I furthermore argue that this is (...) to be understood as a primarily logical, rather than epistemological point. In concluding, I explain why a notion of interpersonal reasoning makes available an ethics of thought and, specifically, an account of testimonial injustice. (shrink)

One of the central questions in the epistemology of conversational AIs is how to classify the beliefs acquired from them. Two promising candidates are instrument-based and testimony-based beliefs. However, the category of instrument-based beliefs faces an intrinsic problem, and a challenge arises in its application. On the other hand, relying solely on the category of testimony-based beliefs does not encompass the totality of our practice of using conversational AIs. To address these limitations, I propose a novel classification of beliefs that (...) shifts the focus from the properties of the conversational AIs themselves to how recipients perceive AI output, specifically whether they take the output at face value. The proposed categories are beliefs by regarding as instruments and beliefs by regarding as testifiers. By using these complementary categories, a more comprehensive understanding of beliefs acquired from conversational AIs can be achieved while avoiding the problems associated with the traditional classification. (shrink)

An epistemic agent A is a false epistemic authority for others iff they falsely believe A to be in a position to help them accomplish their epistemic ends. A major divide exists between what I call "epistemic quacks", who falsely believe themselves to be relevantly competent, and "epistemic charlatans", i.e., false authorities who believe or even know that they are incompetent. Both types of false authority do not cover what Lackey (2021) calls "predatory experts": experts who systematically misuse their social-epistemic (...) status as a cover for predatory behavior. Qua experts, predatory experts are competent and thus could (and maybe sometimes do) help their clients. But should we count them as genuine epistemic authorities? No, I argue, they are false epistemic authorities because, in addition to their practical and moral misconduct, such experts systematically deceive their clients, thereby thwarting the clients’ epistemic ends. (shrink)

En este artículo se emplea la epistemología del testimonio kantiana para analizar el concepto de _akrasia _epistémica (es decir, creer que _p_ cuando se tienen motivos de orden epistémico para sostener que _¬p_) en el caso de las teorías conspirativas. Se señala que las personas suelen mantener esa clase de discursos por motivos sociales (e.g. Pertenecer a un grupo que comparte esas ideas) antes que por una genuina incomprensión de la evidencia como tal, de modo que el problema es fundamentalmente (...) moral. Ante esto, se indica que la _akrasia_ epistémica es primeramente una forma de _akrasia_ moral que explica a través del autoengaño, en tanto que ningún agente moral quiere tenerse a sí mismo como malo. Por consiguiente, se puede afirmar que, desde el punto de vista de la audiencia, el sostener un testimonio que contenga teorías conspirativas en un asunto ético en principio, aunque con consecuencias epistémicas evidentes. _Palabras clave: _akrasia epistémica, testimonio, teorías conspirativas, epistemología kantiana, autoengaño. (shrink)

This article examines the meaningful intervention that Gert-Jan Van der Heiden’s recent book, The Voice of Misery: A Continental Philosophy of Testimony, makes in the developing field of the philosophy of testimony. I argue that this intervention is accomplished through a phenomenological investigation into the nature of the testimonial object and of the demand that it makes upon one who bears witness. In taking such an approach, I argue, Van der Heiden initiates an ontological turn in the field of testimonial (...) theory, shifting the conversation away from a debate about the conditions in which belief in testimony is justified – a debate that has in many ways defined the field for philosophers in the Anglo-American tradition. I suggest that Van der Heiden’s account is helpful in demonstrating that, in many cases, doing justice to a testimonial object requires an epistemic-ethical attitude other than belief. The article concludes by developing a few questions for Van der Heiden based on my interpretation of his project, including to what extent his phenomenology of testimony can account for how often our receptivity to testimony depends on the default trust that we have in others by virtue of our fundamental immersion in social life. (shrink)

This paper identifies two distinct dimensions of what might be called testimonial strength: first, in the case of testimony from more than one speaker, testimony can be said to be stronger to the extent that a greater proportion of the speakers give identical testimony; second, in both single-speaker and multi-speaker testimony, testimony can be said to the stronger to the extent that each speaker expresses greater conviction in the relevant proposition. These two notions of testimonial strength have received scant attention (...) in the philosophical literature so far, presumably because it has been thought that whatever lessons we learn from thinking about testimony as a binary phenomenon will apply mutatis mutandis to varying strengths of testimony. This paper shows that this will not work for either of the two aforementioned dimensions of testimonial strength, roughly because less testimony can provide more justification in a way that can only be explained by appealing to the (non-binary) strength of the testimony itself. The paper also argues that this result undermines some influential versions of non-reductionism about testimonial justification. (shrink)

Can fictions make genuine assertions about the actual world? Proponents of the ‘Assertion View’ answer the question affirmatively: they hold that authors can assert, by means of explicit statements that are part of the work of fiction, that something is actually the case in the real world. The ‘Nonassertion’ View firmly denies this possibility. In this paper, I defend a nuanced version of the Nonassertion View. I argue that even if fictions cannot assert, they can indirectly communicate that what is (...) recounted as fictional is actually true. I show that this view is supported by independent linguistic data, and that it is able to defuse the objections that are typically raised against the Nonassertion View. I conclude by showing that this position has some interesting implications for testimonial cognitivism about fiction. (shrink)

In this paper, I argue that Husserl offers an important, although almost completely neglected so far, contribution to the reductionist/antireductionist debate about testimony. Through a phenomenological analysis, Husserl shows that testimony works through the constitution of an intentional intersubjective bond between the speaker and the hearer. In this paper I focus on the Logical Investigations, a 1914 manuscript now published as text 2 in Husserliana 20.2, and a 1931 manuscript now published as Appendix 12 in Husserliana 15. I argue that, (...) in those texts, Husserl highlights three essential phenomenological features of testimony: a) testimony is personal, meaning that it only takes place among persons, b) testimony is social, meaning that it requires the joint effort of multiple cognitive agents, c) testimony is community-building, meaning that it generates a long-lasting social bond among the parts involved. (shrink)

In order to develop a hermeneutic-phenomenological analysis of testimony, this essay will first argue that testimony is “said in many ways” without being homonymous and that contemporary epistemological approaches to testimony are not capable of accounting for all paradigmatic forms of testimony. Second, it is argued, following and extending the work of Paul Ricoeur, that by emphasizing the sense of engagement or Bezogenheit as a basic characteristic of testimony, we may find another approach to testimony that offers a phenomenological alternative (...) to the observational model of witnessing and the accompanying conception of testimony as report. Third, this approach is further developed and analyzed in terms of the four elements of testimony, namely, subject matter, witness, act of testifying, and addressee. (shrink)

This is a critical review of Moran's assurance view of testimony.

[The version of this paper published by Oxford online in 2019 was not copy-edited and has some sense-obscuring typos. I have posted a corrected (but not the final published) version on this site. The version published in print in 2020 has these corrections.] Which is more fundamental, assertion or testimony? Should we understand assertion as basic, treating testimony as what you get when you add an interpersonal addressee? Or should we understand testimony as basic, treating mere assertion -- assertion without (...) testimony -- as what you get when you subtract that interpersonal relation? In this chapter, I’ll argue for the subtractive approach and for the more general thesis that its treatment of the interpersonal element in assertion makes understanding that interpersonal element the key to understanding how assertion expresses belief. My theory of belief-expression in assertion treats it as internalizing the transmission of belief in testimony. How we understand that internalizing move depends on how we conceptualize the interpersonal element in testimony. Since what I’ll call the Command Model does not give us the conceptual resources to make this move, we should adopt an alternative that I’ll call the Custodial Model, on which a testifier aims not to convince her addressee but to reason with him – to give him reasons to believe what she tells him grounded in her trustworthiness in thus attempting to influence him. The subtractive approach to assertion thus rests on a key distinction between the aims of reasoning and persuasion. (shrink)

Volume 23, Issue 3, September 2020, Page 271-280.

Epistemologists have addressed a variety of modal epistemic standings, such as sensitivity, safety, risk, and epistemic virtue. These concepts mark out the ways that beliefs can fail to track the truth, articulate the conditions needed for knowledge, and indicate ways to become a better epistemic agent. However, it is our contention that current ways of carving up epistemic modality ignore the complexities that emerge when individuals are embedded within a community and listening to a variety of sources, some of whom (...) are intentionally engaged in deception or bullshit. In this context we want our beliefs to be secure. In this paper we translate the epistemic modal standing of safety into a framework appropriate for social epistemology and argue for the importance of epistemic network-security and belief-security to be added to this framework. We discuss the virtues that are salient for promoting network-security and the vices that undermine it. In particular, we highlight monitoring, adjusting, and restructuring virtues and vices. Importantly, each of these vices can be other-regarding or self-regarding. For example, one tempting way of dealing with insecurity within a network is to completely cut oneself off from biased sources. However, we argue that this is a self-regarding restructuring vice because it closes oneself off from opportunities for epistemic growth. By contrast, an other-regarding restructuring vice would be to cut off others from hearing from sources of information that would make their network more secure. (shrink)

This chapter explores two kinds of testimonial trust, what we call ‘evidential trust’ and ‘non-evidential trust’ with the aim of asking how testimonial trust could provide epistemic reasons for belief. We argue that neither evidential nor non-evidential trust can play a distinctive role in providing evidential reasons for belief, but we tentatively propose that non-evidential trust can in some circumstances provide a novel kind of epistemic reason for belief, a reason of epistemic facilitation. The chapter begins with an extensive discussion (...) of standard accounts of both kinds of trust and criticises especially the standard accounts of non-evidential trust. A new account of non-evidential trust is offered that avoids a number of difficulties that plague the standard accounts by rejecting what we call ‘attitude-liability assumptions’. (shrink)

We are becoming increasingly dependent on robots and other forms of artificial intelligence for our beliefs. But how should the knowledge gained from the “say-so” of a robot be classified? Should it be understood as testimonial knowledge, similar to knowledge gained in conversation with another person? Or should it be understood as a form of instrument-based knowledge, such as that gained from a calculator or a sundial? There is more at stake here than terminology, for how we treat objects as (...) sources of knowledge often has important social and legal consequences. In this paper, I argue that at least some robots are capable of testimony. I make my argument by exploring the differences between instruments and testifiers on a well-known account of knowledge: reliabilism. On this approach, I claim that the difference between instruments and testifiers as sources of knowledge is that only the latter are capable of deception. As some robots can be designed to deceive, so they too should be recognized as testimonial sources of knowledge. (shrink)

Como una respuesta a la problemática mencionada, Axel Gelfert, profesor e investigador asociado en el Departamento de Filosofı́a de la Universidad de Singapur, publicó en 2014 su A critical introduction to testimony, el cual ha logrado posicionarse como una lectura obligatoria para aquellos interesados en la epistemologı́a del testimonio. En su libro se dedica a recorrer de manera propedéutica cada uno de los tópicos actuales de la epistemologı́a del testimonio, ello sin dejar de lado la profundidad y exhaustividad requerida para (...) una exposición apropiada de la complejidad epistemológica del testimonio como objeto de estudio. (shrink)

I present a novel way to think about promising: Promising as Doxastic Entrustment. The main idea is that promising is inviting another to entrust her belief to you, and that taking a promiser’s word is freely choosing to accept this invitation. I explicate this through considering the special kind of reason for belief issued by a promiser: a reason whose rational status depends both on the will of the promiser to provide it, and on the will of the promisee to (...) accept it. Though this may seem to raise worries about believing at will, I show how such concerns can be navigated. I then argue that the view provides a rich, attractive understanding of the interpersonal bond forged through promising. According to the Doxastic Entrustment view, that bond results from freely given trust, in exchange for freely assumed responsibility for what is entrusted: namely, a bit of the promisee’s own mind. (shrink)

In this paper, I investigate under-explored moments in Rousseau’s and Adam Smith’s writings in which each presents speech, and particularly testimony, as a manifestation of the desire for others’ recognition. I begin by considering some features of Rousseau’s understanding of amour-propre (or the desire for recognition from others) as well as that desire’s relevance for the conception of vocal speech (as in its nature passional) at the center of Rousseau’s Essay on the Origin of Languages. Since a feeling of insult (...) is the characteristic response to the thwarting of amour-propre, this connection between amour-propre and vocal speech might help to illuminate the distinctive insult (remarked upon by several philosophers) in having one’s speech act rejected. But there is also something incomplete in this thought insofar as it cannot yet distinguish the rejection involved in, say, not being believed from just any thwarting of amour-propre (or any instance of taking oneself to be demoted in another’s opinion). I then consider the possibility that this latter sort of observation might lie behind not only Adam Smith’s interest in what he calls our “mortification” in not being believed, but also his interest in a distinctive kind of response that we typically think of ourselves as owed, especially in the context of our addressing another person, but whose satisfactoriness consists in its being unforced. I end the paper by considering how Rousseau’s egalitarian political prescriptions (which contrast with the individual psychological maneuvers that Smith offers to those who go unbelieved) can be understood, in part, as aiming to limit the social significance of our dependence on another’s capricious judgment about our trustworthiness. (shrink)

This is a survey article about testimony. It discusses questions concerning the nature and the epistemology of the division of epistemic labour.

Jonathan Kvanvig has proposed a non-cognitive theory of faith. He argues that the model of faith as essentially involving assent to propositions is of no value. In response, I propose a Thomistic cognitive theory of faith that both avoids Kvanvig’s criticism and presents a richer and more inclusive account of how faith is intrinsically valuable. I show these accounts of faith diverge in what they take as the goal of the Christian life: personal relationship with God or an external state (...) of affairs. For this reason, more seriously, the non-cognitivist project likely requires rejecting traditional Christianity and its picture of salvation. (shrink)

An enduring puzzle in philosophy and developmental psychology is how young children acquire number concepts, in particular the concept of natural number. Most solutions to this problem conceptualize young learners as lone mathematicians who individually reconstruct the successor function and other sophisticated mathematical ideas. In this chapter, I argue for a crucial role of testimony in children’s acquisition of number concepts, both in the transfer of propositional knowledge (e.g., the cardinality concept), and in knowledge-how (e.g., the counting routine).

Social knowledge, for the most part, is knowledge through testimony. This essay is an overview of the epistemology of testimony. The essay separates knowledge from justification, characterizes testimony as a source of belief, explains why testimony is a source of knowledge, canvasses arguments for anti-reductionism and for reductionism in the reductionism vs. anti-reductionism debate, addresses counterexamples to knowledge transmission, defends a safe basis account of testimonial knowledge, and turns to social norms as a partial explanation for the reliability of testimony.

In contemporary social epistemology, the claim has been made that there is a traditional “neglect of testimonial knowledge,” and that in the history of epistemology, first-hand self-knowledge was invariably prioritised over secondary knowledge. While this paper acknowledges some truth in these statements, it challenges the given explanations: the mentioned neglect of testimonial knowledge is based not so much on a primacy of self-knowledge, but that of self-agency. This article retraces some crucial chapters of this ‘do-it-yourself’ paradigm: it considers the imperative (...) of autopsia in early Greek epistemology, history and medicine, and the early modern refashioning of the privilege of self-generated and self-taught (autodidactic) knowledge. A new picture emerges of how the emphasis on (self-)agency progressively shifted towards a focus on the self as the source of ultimate knowledge. (shrink)

The current debate over aesthetic testimony typically focuses on cases of doxastic repetition — where, when an agent, on receiving aesthetic testimony that p, acquires the belief that p without qualification. I suggest that we broaden the set of cases under consideration. I consider a number of cases of action from testimony, including reconsidering a disliked album based on testimony, and choosing an artistic educational institution from testimony. But this cannot simply be explained by supposing that testimony is usable for (...) action, but unusable for doxastic repetition. I consider a new asymmetry in the usability aesthetic testimony. Consider the following cases: we seem unwilling to accept somebody hanging a painting in their bedroom based merely on testimony, but entirely willing to accept hanging a painting in a museum based merely on testimony. The switch in intuitive acceptability seems to track, in some complicated way, the line between public life and private life. These new cases weigh against a number of standing theories of aesthetic testimony. I suggest that we look further afield, and that something like a sensibility theory, in the style of John McDowell and David Wiggins, will prove to be the best fit for our intuitions for the usability of aesthetic testimony. I propose the following explanation for the new asymmetry: we are willing to accept testimony about whether a work merits being found beautiful; but we are unwilling to accept testimony about whether something actually is beautiful. (shrink)

Humans are becoming increasingly dependent on the ‘say-so' of machines, such as computers, smartphones, and robots. In epistemology, knowledge based on what you have been told is called ‘testimony' and being able to give and receive testimony is a prerequisite for engaging in many social roles. Should robots and other autonomous intelligent machines be considered epistemic testifiers akin to those of humans? This chapter attempts to answer this question as well as explore the implications of robot testimony for the criminal (...) justice system. Few are in agreement as to the ‘types' of agents that can provide testimony. The chapter surveys three well-known approaches and shows that on two of these approaches being able to provide testimony is bound up with the possession of intentional mental states. Through a discussion of computational and folk-psychological approaches to intentionality, it is argued that a good case can be made for robots fulfilling all three definitions. (shrink)

Social epistemology has paid little attention to oral historiography as a source of expert insight into the credibility of testimony. One extant suggestion, however, is that oral historians treat testimony with a default trust reflecting a standing warrant for accepting testimony. The view that there is such a standing warrant is sometimes known as the Acceptance Principle for Testimony. I argue that the practices of oral historians do not count in support of APT, all in all. Experts have commonly described (...) oral traditions as oriented towards political, cultural and entertainment ends, and not only—or not even—towards an accurate depiction of past events. Even when accuracy is the emphasis, many historians of oral tradition do not trust such testimony as APT would suggest; the importance of gathering supporting evidence is a consistent emphasis. Yet oral historiography, both of traditions and more generally, does hold out lessons for the epistemology of testimony, implicating a wider range of social.. (shrink)

Fricker has proposed that a hearer’s knowledge that p acquired through trusting a speaker requires the speaker to know that p, and that therefore testimonial knowledge through trust is necessarily second-hand knowledge. In this paper, I argue that Fricker’s view is problematic for four reasons: firstly, Fricker’s dismissal of a central challenge to the second-handedness of testimonial knowledge is based on a significant misrepresentation of this challenge; secondly, on closer scrutiny an important distinction Fricker wants to draw is compromised by (...) her account of trust; thirdly, Fricker’s conception of trust is at odds with our natural understanding of this notion; fourthly, the reasons Fricker cites in support of her view are not sufficient to single out her view as the correct one, since rival views can also accommodate the relevant data. (shrink)

The epistemology of testimony has experienced a growth in interest over the last twenty-five years that has been matched by few, if any, other areas of philosophy. _Testimony: A Philosophical Introduction _provides an epistemology of testimony that surveys this rapidly growing research area while incorporating a discussion of relevant empirical work from social and developmental psychology, as well as from the interdisciplinary study of knowledge-creation in groups. The past decade has seen a number of scholarly monographs on the epistemology of (...) testimony, but there is a dearth of books that survey the current field. This book fills that gap, assessing the strengths and weaknesses of all major competing theories. All chapters conclude with Suggestions for Further Reading and Discussion Questions. (shrink)

Jennifer Lackey’s case “Creationist Teacher,” in which students acquire knowledge of evolutionary theory from a teacher who does not herself believe the theory, has been discussed widely as a counterexample to so-called transmission theories of testimonial knowledge and justification. The case purports to show that a speaker need not herself have knowledge or justification in order to enable listeners to acquire knowledge or justification from her assertion. The original case has been criticized on the ground that it does not really (...) refute the transmission theory, because there is still somebody in a chain of testifiers—the person from whom the creationist teacher acquired what she testifies—who knows the truth of the testified statements. In this paper, we provide a kind of pattern for generating counterexample cases, one that avoids objections discussed by Peter Graham and others in relation to such cases. (shrink)

In this paper I argue that the nature of our epistemic entitlement to rely on certain belief-forming processes—perception, memory, reasoning, and perhaps others—is not restricted to one's own belief-forming processes. I argue as well that we can have access to the outputs of others’ processes, in the form of their assertions. These two points support the conclusion that epistemic entitlements are “interpersonal.” I then proceed to argue that this opens the way for a non-standard version of anti-reductionism in the epistemology (...) of testimony, and a more “extended” epistemology—one that calls into question the epistemic significance that has traditionally been ascribed to the boundaries separating individual subjects. (shrink)

What, if anything, is wrong with acquiring moral beliefs on the basis of testimony? Most philosophers think that there is something wrong with it, and most point to a special problem that moral testimony is supposed to create for moral agency. Being a good moral agent involves more than bringing about the right outcomes. It also involves acting with "moral understanding" and one cannot have moral understanding of what one is doing via moral testimony. And so, adherents to this view (...) claim, relying on moral testimony is problematic. Importantly, the problem that afflicts moral testimony, according to this view, is not a problem for testimonial knowledge in general. Indeed, critics of moral testimony acknowledge that a vast amount of our knowledge comes, completely unproblematically, from testimony. Call this the Asymmetry Thesis. We argue that while the diagnosis of what is wrong with moral testimony (when there is something wrong with it) in terms of moral understanding is correct, the lesson many of its adherents draw from it, namely that there is a principled difference between moral an non-moral testimony which renders the first, but not the second, problematic, is not. In other words, we argue that the Asymmetry Thesis is false. (shrink)

Previous assurance-theoretic treatments of testimony have not adequately explained how the transmission of warrant depends specifically on the speaker’s mode of address – making it natural to suspect that the interpersonal element is not epistemic but merely psychological or action-theoretic. I aim to fill that explanatory gap: to specify exactly how a testifier’s assurance can create genuine epistemic warrant. In doing so I explain (a) how the illocutionary norm governing the speech act proscribes not lies but a species of bullshit, (...) in an extension of Harry Frankfurt’s sense, (b) how that norm makes testimony fully second-personal, in Stephen Darwall’s sense, or bipolar, in Michael Thompson’s sense, and (c) how that species of second-personality or bipolarity is more fundamental than the practical species that Darwall and Thompson discuss. One attraction of this new Assurance View of testimony is that it allows us to reconceptualize the natures of normativity and responsibility more generally, viewing the assurance as implicating us in normative relations of recognition, and therefore of justice, that are not yet moralized with reactive attitudes. (shrink)

I distinguish two notions of agreement in belief: believing the same content versus having beliefs that necessarily coincide/diverge in normative status. The second notion of agreement,, is clearly significant for the communication of beliefs amongst thinkers. Thus there would seem to be some prima facie advantage to choosing the conception of content operative in in such a way that the normative status of beliefs supervenes on their content, and this seems to be the prevailing assumption of many semanticists. I shall (...) argue that de se beliefs and assertions provide a motivation to depart from this assumption, and so do beliefs and assertions concerning what is epistemically possible. I conclude by offering two models of assertoric communication that are compatible with the abandonment of the assumption, and suggesting schematically that each model applies to different cases. (shrink)

Pettit (2006) argues that deferring to majority testimony is not generally rational: it may lead to inconsistent beliefs. He suggests that “another ... approach will do better”: deferring to supermajority testimony. But this approach may also lead to inconsistencies. In this paper, I describe conditions under which deference to supermajority testimony ensures consistency, and conditions under which it does not. I also introduce the concept of “consistency of degree k”, which is weaker than full consistency by ruling out only “blatant” (...) inconsistencies in an agent’s beliefs while permitting less blatant ones, and show that, while super-majoritarian deference often fails to ensure full consistency, it is a route to consistency in this weaker sense. (shrink)

The ideas (i) that skill is a form of knowledge and (ii) that it can be taught are commonplace in both ancient philosophy and everyday life. I argue that contemporary epistemology lacks the resources to adequately accommodate them. Intellectualist and anti-intellectualist accounts of knowledge how struggle to represent the transmission of skill via teaching and learning (§II), in part because each adopts a fundamentally individualistic approach to the acquisition of skill that focuses on individual practice and experience; consequently, learning from (...) an expert’s teaching is rendered at best peripheral (§III). An account of the transmission of skill that focuses on guided practice is shown to be immanent in an anti-individualist account of skill (§IV) that takes seriously the Aristotelian ideas that skills are rational capacities and second natures by developing the thought that doing, teaching, and practising are three moments of an a priori unity: the life-cycle of a skill (§V). (shrink)